MS 261 C-M
English
34
N
If engine performance deteriorates,
check the spark arresting screen in
the muffler
N
Let the muffler cool down
N
Unscrew the screw (1)
N
Pull out spark arresting screen (2)
N
Clean the dirty spark arresting
screen, replace if damaged or
heavily carbonized
N
Refit the spark arresting screen
N
Fit screw
N
If the engine is down on power,
difficult to start or runs poorly at idle
speed, first check the spark plug.
N
Fit a new spark plug after about 100
operating hours – or sooner if the
electrodes are badly eroded. Install
only suppressed spark plugs of the
type approved by STIHL – see
"Specifications".
Removing the Spark Plug
N
Remove the shroud – see "Shroud".
N
Pull off the spark plug boot.
N
Clean away loose dirt from around
the spark plug.
N
Insert the combination wrench
through the grommet (1) and turn it
as necessary to engage the spark
plug's hexagon.
N
Push the combination fully home
against the cylinder.
N
Unscrew the spark plug.
Checking the spark plug
N
Clean dirty spark plug.
N
Check electrode gap (A) and
readjust if necessary – see
"Specifications".
N
Rectify the problems which have
caused fouling of the spark plug.
Possible causes are:
–
Too much oil in fuel mix.
–
Dirty air filter.
–
Unfavorable running conditions.
Spark Arresting Screen in
Muffler
0001BA009 KN
2
1
Spark Plug
5902BA013 KN
5902BA014 KN
1
000BA039 KN
A